I've used them ever since they have been available to buy. I know fast if I don't use one in my bobbin. The bird's nest of thread stopped when I started using them. If your machine has a metal bobbin case take out the spring thingy in the bottom of the case. It comes out easy and goes back in easy. I use prewound bobbins more then winding them myself and I take the paper off both sides if there is any. I use Glide Delights bobbins when machine quilting. I use them in my drop in bobbin machines too, Janome Jem works great with them.
Forgot to add they last a long time. My problem is dropping them and can't find them.
Last edited by Onebyone; 02-20-2014 at 10:32 AM.